JP2012059478A - Induction heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an induction heating cooker with improved usability for cooking.SOLUTION: The induction heating cooker comprises: a body; and a top plate provided on a top face of the body on which a pan is placed. The body includes induction heating coils heating a pan, a temperature detector detecting a temperature of a pan bottom through the top plate, an inverter power supply supplying power to the induction heating coils, an operation part for setting a temperature of a pan and control means controlling the inverter power supply to supply power to the induction heating coils based on a detection result by the temperature detector so as to keep the temperature of the pan at the temperature set at the operation part. The control means stops cooking in the case where the temperature detector does not detect lowering of the temperature when power is supplied to the induction heating coils after heating for frying is started and the temperature detector detects achieving of a controlled temperature thereby notifying a user of achieving a proper temperature.

Description

  The present invention relates to an induction heating cooker.

  As a conventional induction heating cooker, in cooking that sets the temperature of oil and the temperature of a frying pan (pan) and maintains that temperature, when it reaches the set temperature, it informs that the preheating of the pan has ended by an appropriate temperature notification, and returns to the set temperature After reaching the temperature, control the heating with the minimum heating power to maintain the temperature of the pan at an appropriate temperature, and when the thermal power is input from the thermal power setting means, the pan is heated with the input thermal power, and the thermal power is heated within a certain time after reporting the optimal temperature When there is no input from the setting means, there is one in which heating by the minimum thermal power is stopped (Patent Document 1).

JP 2008-311000 A

  The induction heating cooker of Patent Literature 1 sets the heating power again after reporting the appropriate temperature, thereby confirming the continuation of cooking and continuing the heating. However, before and after the proper temperature notification, it is also a busy time to prepare the ingredients to be heated, and after the proper temperature notification, put the prepared ingredients into a frying pan (pan). Therefore, it is troublesome to set the thermal power again by the thermal power setting means at the timing after notification of the appropriate temperature, and there is a problem that the setting may be forgotten.

  In order to solve the above problems, a top plate on which a pan is placed is disposed on the upper surface of the main body, and an induction heating coil for heating the pan is disposed inside the main body, and the temperature of the pan bottom of the pan over the top plate. In order to maintain the temperature of the pan at the temperature set by the operation unit, the operation unit that sets the temperature of the pan, the temperature detector that detects the power, the inverter power supply that supplies power to the induction heating coil, Control means for controlling the inverter power supply based on the detection result of the temperature detector and supplying electric power to the induction heating coil, and the control means starts fried food cooking and detects the temperature detected by the temperature detector. After reaching the control temperature and notifying the appropriate temperature, cooking is stopped if the phenomenon that the temperature detected by the temperature detector decreases cannot be detected even when power is supplied to the induction heating coil.

  According to the present invention, after the notification of the appropriate temperature, food such as food is introduced to detect that the temperature at the bottom of the pan is lowered, thereby confirming the continuation of cooking and continuing the heating to improve usability.

It is an external appearance perspective view of the induction heating cooking appliance of one Example. It is a block diagram which shows the circuit structure of the induction heating cooking appliance of one Example. It is a chart figure which shows temperature and electric power at the time of fried food control of one Example.

  An embodiment of the present invention will be described in detail with reference to the drawings described above.

  In FIG. 1, 1 is a main body of an induction heating cooker, and shows the state incorporated in the system kitchen 1a. Reference numeral 2 denotes a top plate disposed on the upper surface of the main body 1 and is made of crystallized glass having high heat resistance. Circular broken lines 3, 4, and 5 are placement portions that indicate positions on which cooking utensils such as the pan 6 are placed. The cooking utensils placed on the placement portions 3, 4, and 5 are provided below the top plate 2. The induction heating coil 13 (FIG. 2) or the heating type circular heater is used for heating.

  Reference numeral 7 denotes a grill provided on the left side of the front surface of the main body 1, which is used when grilling fish, bread, pizza or the like. An operation unit 8 is provided on the right side of the front surface of the main body 1 and includes keys for setting the heating conditions of the induction heating coil 13 and the grill unit 7 which are heating units. Among the keys to be set, a function capable of setting the temperature of the oil in the pan 6 and the temperature of the frying pan in order to fry food with oil such as tempura can be selected. Here, the operation unit 8 is provided on the right side of the front surface of the main body 1, but may be configured to be provided on the upper front portion of the main body. 9 is a main switch provided in the operation unit 8 to turn on and off the power supply of the entire induction heating cooker.

  Reference numeral 10 denotes a display unit for displaying the contents set in the operation unit 8 and the energization state of the induction heating coil 13 provided under the placement units 3, 4, and 5. Reference numeral 11 denotes an air inlet provided on the right rear side of the main body 1 for sucking cooling air into the main body 1. An exhaust port 12 is provided on the left rear side of the main body 1 and exhausts exhaust from the grill portion 7 and waste heat that cools the inside of the main body 1.

  Next, the circuit structure of the induction heating cooking appliance of one Example is demonstrated using FIG. In addition, about 500 g of oil shall be put into the pan 6 here.

  In FIG. 2, 13 is an induction heating coil provided under the top plate 2, which heats the pan 6 by generating an eddy current on the surface of the pan bottom of the pan 6 by the action of the magnetic lines of force. Increase temperature. A temperature detector 14 is provided so as to come into contact with the back surface of the top plate 2, and detects the temperature of the pan bottom of the pan 6 through the top plate 2. In addition, when oil is put into the pan 6 and the temperature is detected, the temperature at the bottom of the pan is indirectly detected through the top plate 2, so the temperature detected by the temperature detector 14 is higher than the actual oil temperature. Low. Reference numeral 16 denotes an inverter power source for supplying electric power to the induction heating coil 13 by the control means 15. A control means 15 controls the power supplied to the induction heating coil 13 by controlling the inverter power supply 16 so that the heating power set by the operation unit 8 is obtained, and the inverter is controlled according to the temperature detected by the temperature detector 14. The power supplied to the induction heating coil 13 is controlled by controlling the power supply 16.

  Next, the heating control of the induction heating cooker according to the embodiment will be described in detail with reference to FIG.

  When the user operates the operation unit 8 to start cooking the fried food (oil set temperature 200 ° C.), the control means 15 uses the temperature detector 14 to set the oil temperature to 200 ° C. The detected temperature is lower than the actual oil temperature. Here, the control temperature detected and controlled by the temperature detector 14 is 185 ° C., which is 15 ° C. lower than 200 ° C. The electric power supplied from the inverter power supply 16 to the induction heating coil 13 is controlled so that the temperature detected by the temperature detector 14 becomes the control temperature (185 ° C.) to be controlled, and the temperature detected by the temperature detector 14 is the control temperature. When it becomes the same, the user is notified that the set temperature has been reached by an appropriate temperature notification.

  When cooking of fried food is started, the power supplied to the induction heating coil 13 is 1500 W, but when the temperature approaches the control temperature as the temperature detected by the temperature detector 14 increases, the power is 1200 W, 1000 W, It is lowered in steps of 500W and 0W.

  When the temperature detected by the temperature detector 14 is stabilized, 500 W of rectangular wave power (first rectangular wave power) is supplied to the induction heating coil 13. Also, an appropriate temperature notification is given to inform the user that the oil temperature has reached the set temperature. As an appropriate temperature notification method, in addition to notification by a buzzer, any of notification by sound, lighting of a lamp, or blinking may be used.

  After notifying the appropriate temperature, the oil temperature drops rapidly when the user inputs food or other food. At this time, the temperature detected by the temperature detector 14 also decreases. The control means 15 detects a decrease in the temperature at the bottom of the pan based on a signal from the temperature detector 14 and controls the electric power supplied to the induction heating coil 13 so as to maintain the control temperature (185 ° C.). In addition, as shown in the figure, when the user puts food such as food into the oil, the temperature at the bottom of the pan suddenly falls, and when the electric power supplied to the induction heating coil 13 is 500 W, the temperature at the bottom of the pan is the control temperature. Since it cannot continue to maintain (185 ° C.), it continues to descend. Therefore, 1000 W and 1500 W are supplied to stop the temperature drop at the bottom of the pan, and the temperature is raised again to the control temperature (185 ° C.).

  When the control means 15 detects that the temperature detected by the temperature detector 14 has dropped even if 500 W of rectangular wave power (first rectangular wave power) is supplied to the induction heating coil 13, the cooked product is input. Judge that it was done.

  When the control means 15 does not detect that the temperature detected by the temperature detector 14 has fallen within T2 time after the notification of the appropriate temperature, the control means 15 determines that the cooked food has not been thrown in, and applies to the induction heating coil 13. Stop power supply and stop fried food cooking.

  However, if the control means 15 detects that the temperature detected by the temperature detector 14 has fallen within T2 time, it determines that the food has been put in, and it is determined that cooking is being performed, and the fried food cooking set Continue.

  Similarly, when the food is repeatedly input, the time is counted again from the time when the control means 15 finally detects the decrease in temperature at which it is determined that the food is input, and it is determined that the food is input within T3 time. If a decrease is detected, cooking is further continued, and cooking is terminated if a decrease in temperature that is determined to be the input of the cooked food is not detected within T3 time.

  In addition, although fried food cooking was mentioned here as an example, it is the same also when cooking while controlling the temperature of a frying pan.

  According to the above-described embodiment, it is possible to confirm the continuation of cooking and continue heating by detecting that the temperature of the pan bottom of the pan is lowered by feeding food or the like after notification of the appropriate temperature. I can do it well.

DESCRIPTION OF SYMBOLS 1 Main body 2 Top plate 6 Pan 8 Operation part 10 Display part 13 Induction heating coil 14 Temperature detector 15 Control means 16 Inverter power supply

Claims (1)

A top plate on which a pan is placed is disposed on the top surface of the main body, an induction heating coil for heating the pan is disposed inside the main body, and a temperature detector for detecting the temperature of the pan bottom of the pan through the top plate; An inverter power supply for supplying power to the induction heating coil, an operation unit for setting the temperature of the pan, and a detection result of the temperature detector for maintaining the temperature of the pan at the temperature set by the operation unit Control means for controlling the inverter power supply based on the power supply to supply power to the induction heating coil,
The control means is a phenomenon in which the temperature detected by the temperature detector is lowered even when power is supplied to the induction heating coil after cooking is started and the temperature detected by the temperature detector reaches the control temperature and an appropriate temperature is notified. An induction heating cooker characterized in that cooking is stopped when it cannot be detected.

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